Homebrew PCBs

also to note when producing boards one is usually using a high speed
spindle and turning 15000 or more rpm

On Sun, Dec 23, 2012 at 7:43 PM, AlienRelics <alienrelics@...> wrote:

> **
>
>
> Widening a hole is asking a lot less than drilling a hole where none
> exists.
>
> Steve Greenfield AE7HD
>
> --- In Homebrew_PCBs@yahoogroups.com, Corey Minion <csminion@...> wrote:
> >
> > Odd, I have drilled out hundreds if not thousands of undersized holes in
> > boards (down to my last 25 boards after 3 years)
> > It was my first pcb design and I screwed that up, never occurred to me
> > that there were different sized leads on that first one.
> > Anyone lubing there bits and tools prior to cutting?
> > Also, are you use some sort of cooling?
> > I use compressed air when working on boards.
> >
> > I have used 2 HSS bits over all that time, never noticed them dull much
> > more than any tool I may work with on polycarb or acrylic.
> > I find it dulls far less than working on ferrous metals, and less than
> > non-ferrous as well.
> >
> > I am a college and real world trained silver(metal)smith since 89.
> > I have always been really conscious of tool sharpness
> >
> > Worst material I have found so far to work with, industrial ceramics.
> > EATS tools. nam nam nam.
> >
>
>  
>



-- 
jeremy youngs


[Non-text portions of this message have been removed]